143A. 2[ Duty deferment.
When any material is imported under an import licence belonging to the category of Advance Licence granted under the imports and Exports (Control) Act, 1947 , (18 of 1947 ). subject to an obligation to export the goods as are specified in the said Licence within the period specified therein the 1[ Assistant Commissioner of Customs] may, not withstanding anything contained in this Act, permit clearance of such material without payment of duty leviable thereon.
The Permission for clearance without payment of duty under sub- section (1) shall be subject to the following conditions, that is to say--
the duty payable on the material imported shall be adjusted against the drawback of duty payable under this Act or under any other law for the time being in force on the export of goods specified in the said Advance Licence; and
where the duty is not so adjusted either for the reason that the goods are not exported within the period specified in the said Advance Licence, or within such extended period not exceeding six months as the 1[ Assistant Commissionr of Customs] may on sufficient cause being shown, allow, or for, any other sufficient reason, the importer shall, notwithsatn- ding anything contained in section 28, be liable to pay the amount of duty not so adjusted together with simple interest thereon at the rate of twelve per cent. per annum from the date the said permission for clearance is given to the date of payment.
While permitting clearance under sub- section (1), the 1[ Assistant Commissioner of Customs] may require the importer to execute a bond with such surety or security as he thinks fit for complying with the conditions specified in sub- section (2).